Polishing holder for workpiece end surface

ABSTRACT

A polishing holder for a workpiece end surface comprises a main body and a framework, in which the main body is coupled to a plurality of fixtures used for coupling to polished-to-be workpieces, a periphery of the main body is provided with a ring first supporting portion; a framework, provided with a second supporting portion surrounding an outside of the first supporting portion. Whereby, the second supporting portion limits a deviation region of the first supporting portion to enable the main body to be kept parallel to a polishing surface during a polished end surface of the workpiece is brought into contact with the polishing surface and polished thereby so that the production time and cost of the first supporting portion can be reduced broadly.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a polishing apparatus for a workpieceend surface, and more particularly to a holder for supporting apolished-to-be optical fiber end surface.

2. Description of Related Art

Optical fiber communication is an indispensable communication tool atthe present and in the future. The main structure of an optical fiberconnector used for the optical fiber communication, as FIG. 1 shows, isconstituted by allowing a fiber optical 11 to be passed through aferrule 12 and then adhered to the ferrule 12 with an adhesive. Theferrule 12 can be made from plastic, glass or ceramics. A projectingspherical surface 121 of the end surface of the ferrule 12 is pressed onan elastic polishing surface and formed by means of coarse grinding,fine grind and polishing. The projecting spherical surface 121 must be aflawless curved surface. Here, an optical axis of the projectingspherical surface 121 can be parallel to a central line of the opticalfiber 11 and can also be slanted up to a small angle in relation to thecentral line.

A conventional method for polishing an optical fiber end surface isallowing the optical fiber end surface to be static and not to be moved,and allowing a polishing surface to be rotated and revolved to processthe polishing on the optical fiber end surface; it can be known from amathematical analysis disclosed in Taiwan Patent No. 485863 entitled as“Polishing apparatus for optical fiber end surface”. If the movement wayof the polishing surface is rotation plus revolution, the optical fiberend surface is merely arranged on the circumference of the optical fiberend surface holder. If there is only revolution without rotation, thewearing degree of every place on the whole optical fiber end surface isthe same. The optical end surf aces can be equally arranged on the wholeoptical fiber end surface. Besides, the patent mentioned above alsodiscloses that if the polishing surface is fabricated to be linear andthe polishing particles on one side of the linear polishing surface arecoarser and the particles of another side thereof are finer. As FIG. 2shows, slide a several optical fiber end surface holders 2, 3 and 4 on alinear polishing surface 5 simultaneously, in which particles of a rightside 6 of the polishing surface is coarser, and a left side 7 of thepolishing surface is finer. The pressure between the optical fiber endsurface arranged on a different position of the holder and the polishingsurface 5 is allowed to be uniform. The optical fiber end surface holder2, 3 and 4 are slid from the side of the polishing 5 with coarserparticles toward the side thereof with finer particles and hence, thecoarse and the fine grinding and the polishing procedures can be done atone time. Thus, if the problem that the pressure between the opticalfiber end surface and the polishing surface is not uniform can besolved, theoretically, a great number of optical fiber end surfaces canbe polished simultaneously.

Basically, the uneven pressure origins from the following reasons:

-   1. supporting points of the optical fiber end surface holder is not    on the force exerting surface generated from the friction between    the optical fiber end surface and the polishing surface so that a    torque force is yielded to cause the holder to be slanted to    generate uneven pressure.-   2. that the polishing surface is not parallel to the holder might    also cause uneven pressure to be yielded if the optical fiber end    surface holder is clipped and fixed.

Please refer to FIGS. 3 and 4. A conventional optical fiber end surfacepolishing apparatus comprises a polishing surface 20, an optical fiberend surface ferrule 22, an optical fiber end surface holder 23 and apressing fixing rod 24, in which an polished-to-be end of the opticalfiber 25 is combined within the optical fiber end surface ferrule 22.When there is a relative movement between the end surface of the opticalfiber 25, the optical fiber end surface holder 23 is subject to atransverse force at the end surface thereof. But, the supporting pointis at the position of a contact point 31 or contact point 32 at thistime such that the optical fiber end surface holder 23 is subject to acounterclockwise torque force and hence, the slanting state thereof isyielded as FIG. 4 shows to cause the optical fiber end surface 251 to belower than the optical fiber end surface 252, i.e. cause the pressureexerted on the end surface 251 is larger than the end surface 252.

For solving the aforementioned problem, U.S. Pat. No. 5,216,846discloses a spacer used for maintain the distance between a workpieceand a polishing surface. Because the polishing surface is elastic,maintaining the distance means maintaining the pressure. In such manner,certain of improvements can be obtained because parts of the unevenpressure are born by the spacer, but, the torque force still existsbecause the fundamental structure is not changed; the factors leadingthe pressure to be uneven still exist. Moreover, U.S. Pat. No. 6,039,630discloses utilizing pressure sensor to measure instant pressure andcompensate the unevenness of pressure by means of the method forelectronically controlling a spring.

Furthermore, such as U.S. Pat. No. 6,077,154 and U.S. Pat. No. 5,351,445respectively propose a design for clipping and fixing an optical fiberend surface, as FIG. 5 shows, in which an optical fiber end surfaceholder 41 is a plurality of optical fiber fixtures 42 for clippingoptical fibers 43. The optical fiber end surface holder 41 is fixed bythe fixture 42 on the upper side of the polishing surface 45. Becausethe optical fiber end surface holder 41 is clipped and fixed, theslanting problem generated from the torque force will not happen. But,there is still one problem; because the holder 41 is clipped to fix andthe direction of the polishing surface 45 is also fixed in this design,in general, the holder 41 and the polishing surface 45 certainly not beable to be accurately parallel to each other. At this moment in time,the common practice is to adjust the angle of the fixture 42 used forfixing the holder 41. But, this is not a natural contact such that alittle unparallel phenomenon certainly exists. Besides, the pressurebetween the end surface of the optical fiber 43 and the polishingsurface is exerted upwards from below; such kind of manner is not onlycomplex but also inconvenient to be automated. Furthermore, if thepolishing surface is linear as FIG. 2 shows and the many optical endsurface holders are disposed and simultaneously slid on this linearpolishing surface, it is then difficult to maintain the uniform pressureof the optical fiber end surface at different positions on each holder.

Two principles of allowing optical fiber end surfaces at differentpositions on a holder to be exerted by a uniform pressure are thefollowings:

-   1. an optical fiber end surface holder cannot be clipped and fixed,    and the holder as well as a polishing surface must be naturally    brought into contact with each other if the polishing surface is a    hard and inelastic polishing surface. It is also to say that the    holder is followed to oscillate up and down if the polishing surface    is oscillated and the average pressure of the end surface at    different positions on the holder still is uniform while being    oscillated up and down. The holder and the polishing surface must be    kept fairly parallel to each other and in the meantime, the holder    can still add pressure on the polishing surface if the polishing    surface is elastic.-   2. a plane formed by the optical fiber end surface in the process of    polishing, i.e. a force exerting surface that the polishing surface    exerts force on the holder needs to be designed with one or a    several supporting points for the optical fiber end surface holders    because the optical fiber end surface holders are not moved or    rotated with the polishing surface in principle in the process of    polishing. For allowing the pressure to be uniform, theses    supporting points must be on this force exerting surface so as to    keep the optical fiber end surface holders not to follow the    polishing surface to move or rotate.

Please refer to FIG. 6. A plurality of symmetrical accepting grooves 61for accepting counterweights 62 are disposed on the periphery of a mainbody 60 of a holder disclosed by U.S. Pat. No. 7,063,062 allows the mainbody 60 to have force to cause the end surfaces of a plurality ofoptical fibers 63 to press down a polishing surface 64 such that themain body 60 contact naturally with the polishing surface 64. But, themain body 60 is not provided with the fixing groove 51 of the main body50 shown in FIG. 6A, and a plurality of symmetrical fixing rods 65 aredisposed below the sides of the main body 60, a projecting contactportion 651 is disposed on the bottom of each fixing rod 65 andpositioned in a fixing groove 661 of each framework 66. A weephole 662for draining fluid dropped into the accepting groove 661 duringpolishing is disposed on the lower end of the fixing groove 661. Acontact surface of the contact portion 651 and the fixing groove 661 isat the same plane as a contact surface of the bottoms of the pluralityof optical fibers 63 to allow the supporting points of the main body 60to be on a force exerting surface generated by the bottoms of theoptical fibers 63 and the polishing surface. Thus, a torque force is notyielded to cause the main body 60 to be slanted and hence, the unevenpressure generation phenomenon can be avoided.

The holder shown in FIG. 6 allows the main body not to be rotated byutilizing the plurality of symmetrical fixing rods 65 to fix the mainbody 60. Only a portion of the polishing surface brought into contactwith the optical fiber end surface is used to cause each polishing pointof the polishing surface 64 rather not to be used uniformly. Besides,bottom ends of the four fixing rods 65 of the main body 60 must be keptat the same plane to cause the manufacturing to be very difficult.

U.S. patent application Ser. No. 11/812,967 discloses a polishing holderfor an optical fiber end surface. A main body and a framework of theholder are respectively provided with corresponding fixing portions, atleast one of the two fixing portions is provided with at least one setof upper contact portion and lower contact portion, the upper contactportion and the lower contact portion on each set are respectivelydisposed on the upper side and the lower side of a contact plane of apolished end surface of the workpiece and a polishing surface. Themutual contact restriction of the upper contact portion, the lowercontact portion and another fixing portion is used to allow the mainbody to maintain parallel to the polishing surface so as to elevate thepolishing speed and quality.

SUMMARY OF THE INVENTION

For further improving a supporting structure between a main body and aframework of a optical fiber end surface polishing holder to allow thesupporting structure to be manufactured more easily to save theproduction time and cost; besides, a position of the main bodycorresponding to a polishing surface can be changed in the process ofpolishing to allow each polishing point of the polishing surface ratherto be uniformly used so as to elevate the polishing quality. Hence, thepresent invention is proposed.

The main object of the present invention is to provide a polishingholder for a workpiece end surface, allowing supporting structures of amain body and a framework to be manufactured more easily.

Another object of the present invention is to provide a polishing holderfor a workpiece end surface, allowing an optical fiber end surface on amain body to be uniformly brought into contact with each area of apolishing surface; each polishing point of the polishing surface can beuniformly worn and torn to enable the polished degree of each opticalfiber end surface to be more uniform so as to elevate the polishingyield factor of all the optical fiber end surfaces.

Still another object of the present invention is to provide a polishingholder for a workpiece end surface allowing each optical fiber to bearranged and retained more conveniently while being polished.

For attaining to the objects mentioned above, the present inventionproposes a polishing holder for a workpiece end surface, comprising:

a main body, coupled to a plurality of fixtures used for respectivelycoupling to polished-to-be workpieces, a periphery of the main body isprovided with a ring first supporting portion; anda framework, provided with a second supporting portion surrounding anoutside of the first supporting portion; whereby, the second supportingportion limits a deviation region of the first supporting portion toenable the main body to be kept parallel to a polishing surface during apolished end surface of the workpiece is brought into contact with thepolishing surface and polished thereby.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more fully understood by reference to, thefollowing description and accompanying drawings, in which:

FIG. 1 is a schematic view of a conventional optical fiber connector;

FIG. 2 is a perspective view of a conventional polishing apparatus;

FIG. 3 is across sectional view of a conventional polishing apparatus;

FIG. 4 is across sectional view of a conventional polishing apparatus inuse;

FIG. 5 is a perspective view of a conventional holder coupled tofixtures;

FIG. 6 is a cross sectional view of a conventional holder;

FIG. 7 is an exploded view of a polishing apparatus of a first preferredembodiment according to the present invention;

FIG. 8 is a perspective view of a polishing apparatus of a firstpreferred embodiment according to the present invention;

FIG. 9 is a cross sectional view of a polishing apparatus of a secondpreferred embodiment according to the present invention;

FIG. 10 is a cross sectional view of a polishing apparatus of a thirdpreferred embodiment according to the present invention;

FIG. 11 is a cross sectional view of a polishing apparatus of a fourthpreferred embodiment according to the present invention;

FIG. 12 is a cross sectional view of a polishing apparatus of a fifthpreferred embodiment according to the present invention;

FIG. 13 is a cross sectional view of a polishing apparatus of a sixthpreferred embodiment according to the present invention;

FIG. 14 is a cross sectional view of a polishing apparatus of a seventhpreferred embodiment according to the present invention; and

FIG. 15 is a perspective view of a polishing apparatus of a eighthpreferred embodiment according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 7 and 8. A holder of a first preferred embodimentaccording to the present invention comprises a main body 71 and aframework 72. The main body 71 is coupled to a plurality of fixtures711; each fixture 711 is coupled to at least one fiber end surfaceferrule to couple to an optical fiber 73. Sides of the main body 71close to a periphery thereof are provided with a plurality of acceptinggrooves 712, 713 to accept counterweights utilized to exert a downwardpressure on the main body 71. But, if there is no counterweight added toexert the downward force on the main body 71, a rotational speed of apolishing surface may be controlled by a friction force between thepolishing surface and optical fiber end surfaces, a rotational anglespeed of the polishing surface must be far smaller than a revolutionaryangle speed thereof. The accepting grooves 712, 713 respectively are acurved groove, cylindrical groove or long groove. A periphery of themain body 71 is provided with a ring first supporting portion 714, anouter wall of the first supporting portion 714 is coupled to at leastone poker bar 715. The framework 72 has a ring second supporting portion721. The second supporting portion 721 surrounds an outer side of thefirst supporting portion 714. A continuous polishing type polishingsurface 74 is further accepted inside the second supporting portion 721.A middle part of the framework 72 is provided with a through hole 722for enabling polished end surfaces of the optical fiber 73 to be proppedagainst the polishing surface 74 to allow the polishing operation to beprocessed. The second supporting portion 721 is provided with a longslot 723 for allowing the poker bar 715 to be passed through and abreach 724 communicated with the long slot 723 for allowing the pokerbar 715 to be passed through the long slot 724 to place in the long slot723 as shown in FIG. 8.

An inner side of the second supporting portion 721 is provided with aring retaining groove 725. A bottom of the first supporting portion 714is accepted in the retaining groove 725. A function of allowing the mainbody 71 to be kept parallel to the polishing surface 74 in the processof polishing can be similarly attained by designing a contact portion ofthe first supporting portion 714 and the retaining groove 725 to beapproximately at the same plane as a contact place of the polished endsurfaces of the optical fibers 73 and the polishing surface 74.Furthermore, contact positions of the polished end surfaces of theoptical fibers 72 and the polishing surface 74 may be changed by pushingthe poker bar 715 to drive the main body 71 to rotate an anglerelatively to the framework 72 and the polishing surface 74 to alloweach polishing point of the polishing surface 74 to be brought intocontact with the polished end surface of the optical fiber 73 moreuniformly thereby allowing each polishing point of the polishing surface74 to be used more equally, abrasion thereof to be more uniform, andallowing the plurality of optical fibers 73 distributed at differentpositions can obtain a more identical polishing type to elevate apolished yield factor of the polished end surfaces of the whole opticalfibers 73.

The supporting structure for the main body 71 and the framework 72 isconstituted by the first and second supporting portions 714, 721 and theretaining groove 725. It is unnecessary to process a difficult operationof adjusting the bottoms of the four fixing rods 65 to be at the samelevel plane while manufacturing the first supporting portion 714 suchthat the production time and cost can be broadly reduced.

Please refer to FIG. 9. A holder of a second preferred embodimentaccording to the present invention comprises a main body 75 and aframework 76. The main body 75 is coupled to a plurality of fixtures751; each fixture 751 is coupled to at least one optical fiber endsurface ferrule to couple to an optical fiber 77. sides of the main body75 close to a periphery thereof is provided with a plurality ofsymmetrical accepting grooves 752, 753 for accepting counterweights 754.The periphery of the main body 75 is provided with a ring firstsupporting portion 755. The framework 76 is provided with a ring secondsupporting portion 761. The second supporting portion 761 surrounds anouter side of the first supporting portion 755. A polishing surface 78is further accepted inside the second supporting portion 761. A middlepart of the framework 76 is provided with a through hole for allowing apolished end surface of the optical fiber 77 to be propped against thepolishing surface 78 to process a polishing operation. An outer wall ofthe first supporting portion 755 is coupled to at least one poker bar,the second supporting portion 761 is provided with a long slot foraccepting the poker bar and a breach communicated with the long slot forallowing the poker bar to be passed through the breach to place in thelong slot as the structure described in the first embodiment; it is notshown in the figure. An inner wall of the second supporting portion 761is provided with projecting upper and lower contact portions 762, 763.The upper and lower contact portions 762, 763 are respectivelypositioned in a range of approximately 2 centimeters above and below acontact plane 781 of the polished end surface of the optical fiber 77and the polishing surface 78. The upper and lower contact portions 762,763 can respectively limit a deviation range of the first supportingportion 755 in the process of polishing. The present embodiment also canattain to allowing a supporting structure for the main body to bemanufactured more easily to enable each polishing point of the polishingsurface to be worn and torn more equally and abrasion of each opticalfiber end surface to be more uniform to elevate a function such as apolishing yield factor of all optical fiber end surfaces.

Please refer to FIGS. 9 and 10. A holder of a third preferred embodimentaccording to the present invention comprises a main body 79 and aframework 80, a structure thereof is approximately the same as theholder of the second embodiment. But, an outer wall of a firstsupporting portion 791 of the main body 79 is provided with projectionupper and lower contact portions 792, 793 to replace the upper and thelower contact portions 762, 763 of the second supporting portion 791 ofthe second embodiment. The upper and the lower contact portions 792, 793are respectively positioned in a range approximately 2 centimeters aboveand below a contact plane 781 of a polished end surface of the opticalfiber 77 and the polishing surface 78, the second supporting portion 801can respectively limit deviation ranges of the upper and the lowercontact portions 792, 793 of the first supporting portion 791. Thepresent embodiment also can attain to allowing a supporting structurefor the main body to be manufactured more easily to enable eachpolishing point of the polishing surface to be worn and torn moreequally and abrasion of each optical fiber end surface to be moreuniform to elevate a function such as a polishing yield factor of alloptical fiber end surfaces.

Please refer to FIGS. 9 and 11. A holder of a fourth preferredembodiment according to the present invention comprises a main body 81and a framework 82, a structure thereof is approximately the same as theholder of the second embodiment. But, a second supporting portion 821 isprovided with a plurality of symmetrically disposed screw holes 8211,8212, the screw holes 8211, 8212 are respectively engaged with screws822, 823; the screws 822, 823 are projected out of an inner wall of thesecond supporting portion 821 to form projecting upper and lower contactportions 824, 825 to replace the upper and the lower contact portions762, 763 of the second supporting portion 761 of the second embodiment.The upper and the lower contact portions 824, 825 are respectivelypositioned in a range approximately 2 centimeters above and below acontact plane 781 of a polished end surface of the optical fiber 77 andthe polishing surface 78, the upper and the lower contact portions 824,825 of the second supporting portion 821 can respectively limit adeviation range of the first supporting portion 811. The presentembodiment also can attain to allowing a supporting structure for themain body to be manufactured more easily to enable each polishing pointof the polishing surface to be worn and torn more equally and abrasionof each optical fiber end surface to be more uniform to elevate afunction such as a polishing yield factor of all optical fiber endsurfaces. Besides, spaces between the first and the second contactportions 824, 825 and the first supporting portion 811 can be adjustedby utilizing the screws 822, 823.

Please refer to FIGS. 9 and 12. A holder of a fifth preferred embodimentaccording to the present invention comprises a main body 83 and aframework 84, a structure thereof is approximately the same as theholder of the second embodiment. But, a lower end of a first supportingportion 831 is lower than a lower end of a second supporting portion841, upper and lower ends of an inner wall of the second supportingportion 841 is utilized to be upper and lower contact portions 842, 843respectively to replace the projecting upper and lower contact portions762, 763 disposed on the second supporting portion 761 of the secondembodiment. The upper and the lower contact portions 842, 843 arerespectively positioned in a range approximately 2 centimeters above andbelow a contact plane 781 of a polished end surface of the optical fiber77 and the polishing surface 78, the upper and the lower contactportions 842, 843 of the second supporting portion 841 can respectivelylimit a deviation range of the first supporting portion 831. The presentembodiment also can attain to allowing a supporting structure for themain body to be manufactured more easily to enable each polishing pointof the polishing surface to be worn and torn more equally and abrasionof each optical fiber end surface to be more uniform to elevate afunction such as a polishing yield factor of all optical fiber endsurfaces.

Please refer to FIGS. 9 and 13. A holder of a sixth preferred embodimentaccording to the present invention comprises a main body 85 and aframework 86, a structure thereof is approximately the same as theholder of the second embodiment. But, a lower end of a first supportingportion 851 is higher than a lower end of a second supporting portion861, a upper end of an inner wall of the second supporting portion 861and a portion of the inner wall thereof corresponding to a lower end ofa first supporting portion 851 are utilized to be upper and lowercontact portions 862, 863 respectively to replace the projecting upperand lower contact portions 762, 763 disposed on the second supportingportion 761 of the second embodiment. The upper and the lower contactportions 862, 863 are respectively positioned in a range approximately 2centimeters above and below a contact plane 781 of a polished endsurface of the optical fiber 77 and the polishing surface 78, the upperand the lower contact portions 862, 863 of the second supporting portion861 can respectively limit a deviation range of the first supportingportion 851. The present embodiment also can attain to allowing asupporting structure for the main body to be manufactured more easily toenable each polishing point of the polishing surface to be worn and tornmore equally and abrasion of each optical fiber end surface to be moreuniform to elevate a function such as a polishing yield factor of alloptical fiber end surfaces.

Please refer to FIGS. 9 and 14. A holder of a seventh preferredembodiment according to the present invention comprises a main body 87and a framework 88. A structure thereof is approximately the same as theholder of the second embodiment. But, the main body 87 and the framework88 have no disposition of such as poker bar, long slot or breach as themain body 75 as the framework 76 of the second embodiment have. An outerwall of a first supporting portion 871 of the main body 87 is providedwith a rack 872. A slot is disposed between first and second contactportions 882, 883 of the second supporting portion 881 of the framework88. The framework is further coupled to a transmission mechanism 885. Atransmission gear 884 of the transmission mechanism 885 is passedthrough the slot of the second supporting portion 881. The main body 87can be driven by the transmission mechanism 885 to rotate when the rack872 is engaged with the transmission gear 884. The upper and the lowercontact portions 882, 883 of the second supporting portion 881 canrespectively limit a deviation range of the first supporting portion871. The present embodiment also can attain to allowing a supportingstructure for the main body to be manufactured more easily to enableeach polishing point of the polishing surface to be worn and torn moreequally and abrasion of each optical fiber end surface to be moreuniform to elevate a function such as a polishing yield factor of alloptical fiber end surfaces. Besides, the main body 87 is driven torotate through the transmission gear 884 to change a contact position ofa polished end surface of the optical fiber 77 and the polishing surface78 to allow each polishing point of the polishing surface 78 to bebrought into contact with the polished end surface of the optical fiber77 more uniformly thereby allowing each polishing point of the polishingsurface 78 to be used more equally, abrasion thereof to be more uniform,and allowing the plurality of optical fibers 77 distributed at differentpositions can obtain a more identical polishing type to elevate apolished yield factor of the polished end surfaces of the whole opticalfibers 77.

Please refer to FIGS. 7, 8 and 15. A holder of an eighth preferredembodiment according to the present invention comprises the main body 71and the framework 72 of the first embodiment. Besides, the main body 71is further coupled to a hanger 716 provided with a cross rod 717; thecross rod 717 is coupled to a plurality of hooks 718. A middle sectionof the optical fiber 73 may be wound into a multiple number of circles,and then hung on the hook 71. The present embodiment also can attain toallowing a supporting structure for the main body to be manufacturedmore easily to enable each polishing point of the polishing surface tobe worn and torn more equally and abrasion of each optical fiber endsurface to be more uniform to elevate a function such as a polishingyield factor of all optical fiber end surfaces. Besides, each opticalfiber 73 in the process of polishing is allowed to arrange and fix moreconveniently by using the hanger 716.

The holders of holders of the second to seventh embodiments according tothe present invention mentioned above may also be coupled to the hanger716 disclosed in the eighth embodiment to allow each optical fiber inthe process of polishing can be arranged and fixed more conveniently.

The present invention allows a first supporting portion of a main bodyto be ringlike to replace a design of a plurality of fixing rods; it canreduce the production time and cost broadly because a difficultoperation of adjusting the bottoms of the plurality of fixing rods atthe same level plane is unnecessary. The first supporting portion may bea circular ring or other type of ring.

The present invention allows the main body to be rotated an anglerelatively to the framework and the polishing surface to change acontact position of a polished end surface of an optical fiber and apolishing surface to allow each polishing point of the polishing surfaceto be brought into contact with the polished end surface of the opticalfiber more uniformly thereby allowing each polishing point of thepolishing surface to be used more equally, abrasion thereof to be moreuniform, and allowing the plurality of optical fibers distributed atdifferent positions can obtain a more identical polishing type toelevate a polished yield factor of the polished end surfaces of thewhole optical fibers.

Additional advantages and modifications will readily occur to thoseskilled in the art. Therefore, the invention in its broader aspects isnot limited to the specific details and representative embodiments shownand described herein. Accordingly, various modifications may be madewithout departing from the spirit or scope of the general inventiveconcept as defined by the appended claims and their equivalents.

1. A polishing holder for a workpiece end surface, comprising a mainbody and a framework; said main body being coupled to a plurality offixtures used for coupling to workpieces-to-be-polished; a periphery ofsaid main body being provided with a ring first supporting portion; saidframework having a second supporting portion; said second supportingportion surrounding an outside of said first supporting portion therebyallowing said second supporting portion to limit a deviation range ofsaid first supporting portion to enable said main body to keep parallelto said polishing surface when a polished end surface of said workpieceis brought into contact with a polishing surface and polished thereby.2. The polishing holder for a workpiece end surface according to claim1, wherein an outer wall of said first supporting portion is coupled toat least one poker bar; said second supporting portion is provided witha long slot for allowing said poker bar to be passed through therebychanging a contact position of said polished end surface of saidworkpiece and said polishing surface by allowing said poker bar to bedriven by said poker bar to rotate an angle relatively to said frameworkand said polishing surface.
 3. The polishing holder for a workpiece endsurface according to claim 2, wherein said second supporting portion isprovided with a breach communicated with said long slot thereby allowingsaid poker bar to be passed through said breach to place in said longslot.
 4. The polishing holder for a workpiece end surface according toclaim 1, wherein an inner wall of said first supporting portion isprovided with a rack; said second supporting portion is provided with aslot corresponding to said rack; said framework is further coupled to atransmission mechanism; a transmission gear of said transmissionmechanism is passed through said slot thereby allowing said main body tobe driven to rotate by said transmission mechanism to change a contactposition of said polished end surface of said workpiece and saidpolishing surface when said rack is engaged with said transmission gear.5. The polishing holder for a workpiece end surface according to claim1, wherein said main body is further coupled to a hanger; said hangerhas a cross rod; said cross rod is coupled to a multiple number of hooksthereby allowing a section of said workpiece to be hung on said hook. 6.The polishing holder for a workpiece end surface according to claim 5,wherein an inner side of said second supporting portion is provided witha ring retaining groove; a bottom of said first supporting portion isaccepted in said retaining groove; a contact portion of said firstsupporting portion and said retaining groove is approximately at thesame plane as a contact plane of said polished end surface of saidworkpiece and said polishing surface.
 7. The polishing holder for aworkpiece end surface according to claim 5, wherein one of the firstsupporting portion and the second supporting portion is provided with aupper contact portion and a lower contact portion; said upper contactportion and said lower contact portion are respectively above and belowa contact plane of said polished end surface of said workpiece and saidpolishing surface.
 8. The polishing holder for a workpiece end surfaceaccording to claim 7, wherein an inner wall of said second supportingportion is provided with said projecting upper and lower contactportions
 9. The polishing holder for a workpiece end surface accordingto claim 7, wherein an outer wall of said first supporting portion isprovided with said projecting upper and lower contact portions.
 10. Thepolishing holder for a workpiece end surface according to claim 7,wherein said second supporting portion is provided with a plurality ofsymmetrical screw holes, each said screw hole is engaged with a screw,said screws are projected out of an inner wall of said second supportingportion to form said projecting upper and lower contact portions therebyadjusting spaces between said first, said second contact portions andsaid first supporting portion through said screws.
 11. The polishingholder for a workpiece end surface according to claim 7, wherein a lowerend of said first supporting portion is lower than a lower end of saidsecond supporting portion, upper and lower end of an inner wall of saidsecond supporting portion respectively are said upper and said lowercontact portions.
 12. The polishing holder for a workpiece end surfaceaccording to claim 7, wherein a lower end of said first supportingportion is higher than a lower end of said second supporting portion, aupper end of an inner wall of said second supporting portion and aportion of an inner wall of said second supporting portion correspondingto a lower end of said first supporting portion respectively are saidupper and said lower contact portions.
 13. The polishing holder for aworkpiece end surface according to claim 3, wherein said main body isfurther coupled to a hanger; said hanger has a cross rod; said cross rodis coupled to a multiple number of hooks thereby allowing a section ofsaid workpiece to be hung on said hook.
 14. The polishing holder for aworkpiece end surface according to claim 13, wherein an inner side ofsaid second supporting portion is provided with a ring retaining groove;a bottom of said first supporting portion is accepted in said retaininggroove; a contact portion of said first supporting portion and saidretaining groove is approximately at the same plane as a contact planeof said polished end surface of said workpiece and said polishingsurface.
 15. The polishing holder for a workpiece end surface accordingto claim 13, wherein one of the first supporting portion and the secondsupporting portion is provided with a upper contact portion and a lowercontact portion; said upper contact portion and said lower contactportion are respectively above and below a contact plane of saidpolished end surface of said workpiece and said polishing surface. 16.The polishing holder for a workpiece end surface according to claim 15,wherein said second supporting portion is provided with a plurality ofsymmetrical screw holes, each said screw hole is engaged with a screw,said screws are projected out of an inner wall of said second supportingportion to form said projecting upper and lower contact portions therebyadjusting spaces between said first, said second contact portions andsaid first supporting portion through said screws.
 17. The polishingholder for a workpiece end surface according to claim 4, wherein saidmain body is further coupled to a hanger; said hanger has a cross rod;said cross rod is coupled to a multiple number of hooks thereby allowinga section of said workpiece to be hung on said hook.
 18. The polishingholder for a workpiece end surface according to claim 17, wherein aninner side of said second supporting portion is provided with a ringretaining groove; a bottom of said first supporting portion is acceptedin said retaining groove; a contact portion of said first supportingportion and said retaining groove is approximately at the same plane asa contact plane of said polished end surface of said workpiece and saidpolishing surface.
 19. The polishing holder for a workpiece end surfaceaccording to claim 17, wherein one of the first supporting portion andthe second supporting portion is provided with a upper contact portionand a lower contact portion; said upper contact portion and said lowercontact portion are respectively above and below a contact plane of saidpolished end surface of said workpiece and said polishing surface. 20.The polishing holder for a workpiece end surface according to claim 19,wherein said second supporting portion is provided with a plurality ofsymmetrical screw holes, each said screw hole is engaged with a screw,said screws are projected out of an inner wall of said second supportingportion to form said projecting upper and lower contact portions therebyadjusting spaces between said first, said second contact portions andsaid first supporting portion through said screws.